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  <div class="headertitle"><div class="title">UnicodeEmojiParser.cs</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">    VectSharp - A light library for C# vector graphics.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">    Copyright (C) 2024 Giorgio Bianchini</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"></span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment">    This program is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment">    it under the terms of the GNU Lesser General Public License as published by</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">    the Free Software Foundation, version 3.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment">    This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">    but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment">    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">    GNU Lesser General Public License for more details.</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"></span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">    You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">    along with this program. If not, see &lt;https://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment">*/</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="keyword">using </span>Markdig;</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="keyword">using </span>Markdig.Extensions.Emoji;</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="keyword">using </span>Markdig.Helpers;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="keyword">using </span>Markdig.Parsers;</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="keyword">using </span>Markdig.Parsers.Inlines;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="keyword">using </span>Markdig.Renderers;</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="keyword">using </span>System.Globalization;</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span><span class="keyword">using </span>System.Linq;</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespace_vect_sharp_1_1_markdown.html">VectSharp.Markdown</a></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span>{<span class="comment"></span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span><span class="comment">    /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="comment">    /// Contains extension methods for the &lt;see cref=&quot;MarkdownPipelineBuilder&quot;/&gt; class.</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="comment">    /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension.html">   32</a></span><span class="comment"></span>    <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">class </span><a class="code hl_class" href="class_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension.html">MarkdownEmojiExtension</a></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>    {<span class="comment"></span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="comment">        /// &lt;summary&gt;</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="comment">        /// Uses the extension enabling unicode emoji resolution.</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="comment">        /// &lt;/summary&gt;</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span><span class="comment">        /// &lt;param name=&quot;pipeline&quot;&gt;The pipeline.&lt;/param&gt;</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span><span class="comment">        /// &lt;returns&gt;The modified pipeline.&lt;/returns&gt;</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"><a class="line" href="class_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension.html#a41e621cc200878d1d2da2b0bc511eac3">   39</a></span><span class="comment"></span>        <span class="keyword">public</span> <span class="keyword">static</span> MarkdownPipelineBuilder <a class="code hl_function" href="class_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension.html#a41e621cc200878d1d2da2b0bc511eac3">UseUnicodeEmoji</a>(<span class="keyword">this</span> MarkdownPipelineBuilder pipeline)</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>        {</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>            <span class="keywordflow">if</span> (!pipeline.Extensions.Contains&lt;UnicodeEmojiExtension&gt;())</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>            {</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>                pipeline.Extensions.Add(<span class="keyword">new</span> UnicodeEmojiExtension());</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>            }</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>            <span class="keywordflow">return</span> pipeline;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>        }</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>    }</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span> </div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>    <span class="keyword">internal</span> <span class="keyword">class </span>UnicodeEmojiExtension : IMarkdownExtension</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>    {</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>        <span class="keyword">public</span> <span class="keywordtype">void</span> Setup(MarkdownPipelineBuilder pipeline)</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>        {</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>            <span class="keywordflow">if</span> (!pipeline.InlineParsers.Contains&lt;UnicodeEmojiParser&gt;())</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>            {</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>                pipeline.InlineParsers.InsertAfter&lt;CodeInlineParser&gt;(<span class="keyword">new</span> UnicodeEmojiParser());</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>            }</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>        }</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>        <span class="keyword">public</span> <span class="keywordtype">void</span> Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>        {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>            </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>        }</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>    }</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span> </div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>    <span class="keyword">internal</span> <span class="keyword">class </span>UnicodeEmojiParser : InlineParser</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>    {</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>        <span class="keyword">public</span> UnicodeEmojiParser()</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>        {</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>            OpeningCharacters = Enumerable.Range(0xD800, 0xDBFF - 0xD800 + 1).Select(x =&gt; (<span class="keywordtype">char</span>)x).ToArray();</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>        }</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>        <span class="keyword">public</span> <span class="keyword">override</span> <span class="keywordtype">bool</span> Match(InlineProcessor processor, ref StringSlice slice)</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>        {</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>            <span class="keywordflow">if</span> (<span class="keywordtype">char</span>.IsHighSurrogate(slice.CurrentChar))</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>            {</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>                StringInfo info = <span class="keyword">new</span> StringInfo(slice.Text.Substring(slice.Start));</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>                <span class="keywordtype">string</span> emoji = info.SubstringByTextElements(0, 1);</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span> </div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>                processor.Inline = <span class="keyword">new</span> EmojiInline(<span class="stringliteral">&quot;unicode://&quot;</span> + emoji)</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>                {</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>                    Span = {</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>                        Start = processor.GetSourcePosition(slice.Start, out <span class="keywordtype">int</span> line, out <span class="keywordtype">int</span> column)</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>                    },</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>                    Line = line,</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>                    Column = column,</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>                };</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>                processor.Inline.Span.End = processor.Inline.Span.Start + emoji.Length - 1;</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>                slice.Start += emoji.Length;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span> </div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>                <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>            }</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>            <span class="keywordflow">else</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>            {</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>                <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>            }</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>        }</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>    }</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>}</div>
<div class="ttc" id="aclass_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension_html"><div class="ttname"><a href="class_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension.html">VectSharp.Markdown.MarkdownEmojiExtension</a></div><div class="ttdoc">Contains extension methods for the MarkdownPipelineBuilder class.</div><div class="ttdef"><b>Definition:</b> <a href="_unicode_emoji_parser_8cs_source.html#l00032">UnicodeEmojiParser.cs:33</a></div></div>
<div class="ttc" id="aclass_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension_html_a41e621cc200878d1d2da2b0bc511eac3"><div class="ttname"><a href="class_vect_sharp_1_1_markdown_1_1_markdown_emoji_extension.html#a41e621cc200878d1d2da2b0bc511eac3">VectSharp.Markdown.MarkdownEmojiExtension.UseUnicodeEmoji</a></div><div class="ttdeci">static MarkdownPipelineBuilder UseUnicodeEmoji(this MarkdownPipelineBuilder pipeline)</div><div class="ttdoc">Uses the extension enabling unicode emoji resolution.</div><div class="ttdef"><b>Definition:</b> <a href="_unicode_emoji_parser_8cs_source.html#l00039">UnicodeEmojiParser.cs:39</a></div></div>
<div class="ttc" id="anamespace_vect_sharp_1_1_markdown_html"><div class="ttname"><a href="namespace_vect_sharp_1_1_markdown.html">VectSharp.Markdown</a></div><div class="ttdef"><b>Definition:</b> <a href="_html_tag_8cs_source.html#l00027">HtmlTag.cs:28</a></div></div>
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